Numerical control system

Abstract

A numerical control system includes: a context acquisition unit that acquires a context in a machining operation of a machine tool; a state amount detection unit that determines a control state amount of each axis of the machine tool; a state data extraction unit that extracts state data from the state amount by using an extraction pattern based on the context; a feature amount creation unit that creates a feature amount featuring the operation state of the machine tool from the state data; an inference calculation unit that calculates an evaluation value of the operation state based on the feature amount; and an anomaly determination unit that determines the operation state based on a calculation. The numerical control system can detect an anomaly of the operation state in a wider range even when a motor operation pattern during machining, a tool, a work is different.

1 . A numerical control system that determines an operation state of a machine tool, the numerical control system comprising:
 a context acquisition unit that acquires a context in a machining operation of the machine tool;   a state amount detection unit that determines a state amount related to an operation state of the machine tool;   a state data extraction unit that extracts state data from the state amount by using an extraction pattern based on the context in the machining operation acquired by the context acquisition unit;   a feature amount creation unit that creates a feature amount featuring the operation state of the machine tool from the state data;   an inference calculation unit that calculates an evaluation value of the operation state of the machine tool based on the feature amount; and   an anomaly determination unit that determines the operation state of the machine tool based on a calculation result from the inference calculation unit.   
     
     
         2 . The numerical control system according to  claim 1 , further comprising an extraction pattern storage unit that stores a plurality of extraction patterns associated with the context in the machining operation of the machine tool, respectively,
 wherein the state data extraction unit extracts state data from the state amount by using an extraction pattern selected from the extraction pattern storage unit based on the context in the machining operation acquired by the context acquisition unit.